QoSMOS at IEICE 2012

The second international workshop on QoS & Mobility in Cognitive Communications (QMCC'12) was held at the IEICE workshop in Fukuoka, Japn on 17th October 2012. The workshop included a presentations held over two sessions (slides from presentations can be found here).

Technical presentations

The workshop consisted of 8 presentations. As well as contributions from QoSMOS, presentations included work from ICT projects CREW and German Federal Ministry of Economics and Technology funding program IT2Green.

Richard MacKenzie (BT) presents at QMCC'12

Richard MacKenzie (BT) presented "QoSMOS Overview and Scenarios". He described the main QoSMOS concept which allows for opportunistic use of radio spectrum. The main scenarios for a QoSMOS system are described. An overview of a recent investigation into spectrum micro-trading was also given, with initial simulation results showing the viability of a spectrum micro-trading market.

Richard also presented "QoSMOS System Architecture and Reference Model". He showed how the system architecture options can apply a range of scenarios by allowing for a combination of centralised or distributed resource management as well as centralised, distributed or local spectrum sensing. He also gave a detailed explanation of the QoSMOS reference model which allows for system deployment for a wide range of scenarios.

Rohit Datta (TUD) presents at QMCC'12

Rohit Datta (Technical University Dresden) presented "Improved CR Spectrum Sensing Performance with Lower ACLR GFDM Signals". He describes how generalised frequency division multiplexing (GFDM) is attractive moduation scheme for cognitive radios due to its low out-of-band leakage. He then goes on compare the sensing performance of a GFDM receiver to that of OFDM, showing that GFDM has better sensing characteristics.

Zsolt Kollár (BME) presents at QMCC'12

Zsolt Kollár (Budapest University of Technology and Economics) presented "Novel Multicarrier Modulation for Cognitive Radio Systems". He expained the benefits of using filter bank multicarrier (FMC) for cognitive radio whch includes extremely low adjacent channl leakage. Zsolt then discussed some of the challenges for FBMC: vulerability to non-linearities in the tranceiver chain due to large peak-to-average power ratio (PAPR) in the transmitted signal and the need for complex channel equalisation in multi-path channels with large delay spreads. He then described some ofthe solutions to these problems.

János Bitó (BME) presents at QMCC'12

János Bitó (Budapest University of Technology and Economics) presented "Mobile Exploitation of TVWS". He described a situation where secondary users are moving around an area with fixed primary users. The route that a mobile secondary user takes can be ranked based on the opportunities forseen on that route. Examples are discussed for both rural as well as urban environments.

Masayuki Ariyoshi (NEC) presents at QMCC'12

Masayuki Ariyoshi (NEC) presented "Distributed Self-Learning SON Spectrum Manager". He describes a novel self-learning SON approach for distributed cognitive radio management for heterogeneous cellular environments. The approach takes resloves interactions between many coupled parameters and external contraints. Masa showed the results from some simulation studies to show characterise its performance and also to highlight its limitations.

Nicola Michailow (TUD) presents at QMCC'12

Nicola Michailow (Technial University Dresden) presented "Multi-Antenna Detection for Dynamic Spectrum Access: A Proof of Concept". He described the results of an experimental investigation into an LTE spectrum sensing algorithm. The system was implemented using a multi-antenna hardware platform which shows not only the validity of the algorithm but also what performance can be achived in practice.

Dominique Noguet (CEA-LETI) presents at QMCC'12

Dominique Noguet (CEA-LETI) presented "T-Flex: A Mobile SDR Platform for TVWS Flexible Operation". He gave a description of the hardware platform that has been developed during in the QoSMOS project. The discussion focussed on the transmitter which produces uses a filter bank multi-carrier (FBMC) modulation scheme in TVWS which can produce very low out-of-band leakage and can be advantageous when working with fragmented spectrum.